Milwaukee 18V to Evolution 18V EXT Battery Adapter

Use your Milwaukee M18 batteries on Evolution 18V EXT cordless tools, without buying into a second battery platform. Voltage is not the obstacle here — both sides are 18V. The socket is, and that is what this solves. Built with a durable injection-molded ABS housing and pure copper contacts for steady current delivery. It removes the need to keep separate batteries for different platforms, which saves money and simplifies the workflow.

Specifications

• SKU PTA-MIL18-EVO18
• Fits this battery Milwaukee M18 (Lithium-Ion)
• Battery voltage 18V
• Runs these tools Evolution 18V EXT (Lithium-Ion)
• Tool voltage 18V
• Housing ABS (Injected)
• Terminals Copper
• Current rating 40A continuous (80A peak at 18VDC for up to 2 seconds)720 Watt continuous at 18V nominal
• Internal wiring 5 mm²
• Weight 93 g (3.3 oz / 0.21 lb)
• Dimensions (L × W × H) How It's Measured 110 × 70 × 50 mm (4.33 × 2.76 × 1.97 in)
• Colour Black
• Operating humidity 5–95% RH
• Operating temperature -10 °C to 50 °C (14 °F to 122 °F)
• USB port No
• What's in the box Battery Adapter
• Warranty 12 months after the date of delivery
• Revision Revision 01 (released on June 10, 2026)

Why choose this adapter

• Your Milwaukee M18 battery and Evolution 18V EXT tools run at the same voltage, so the adapter changes the fitting rather than converting anything.
• Injection-moulded ABS, not 3D printed — no layer lines to split under load.
• Solid copper terminals, so less of the current is lost as heat.
• 5 mm² internal wiring, rated for 40A continuous with 80A peak at 18VDC for up to 2 seconds, so a high-draw tool is not held back by the adapter.
• Covered by a 12-month warranty from the day it arrives.

Milwaukee M18 and Evolution 18V EXT compatibility

It works in one direction only: Milwaukee batteries powering Evolution tools. For the opposite pairing, see adapters that run on Evolution 18V EXT batteries.

Compatibility can vary with the exact battery and tool model. Before ordering, confirm that your battery belongs to the Milwaukee M18 platform and that your tool takes Evolution 18V EXT batteries.

Important charging and safety information

This adapter is for powering cordless tools and nothing else. It cannot charge Milwaukee or Evolution batteries and must never be connected to a charger of any kind. Always take the battery out of the adapter before charging, and charge it on the original charger made for your Milwaukee M18 battery.